VDB-135167 · CVE-2018-20839 · BID 108389

systemd 242 VT1 Mode Password credentials management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in systemd 242. Affected is an unknown function of the component VT1 Mode. The manipulation leads to credentials management (Password). This vulnerability is uniquely identified as CVE-2018-20839. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in systemd 242 and classified as problematic. This issue affects an unknown code of the component VT1 Mode. The manipulation with an unknown input leads to a credentials management vulnerability (Password). Using CWE to declare the problem leads to CWE-255. Impacted is confidentiality. The summary by CVE is:

systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.

The weakness was disclosed 05/17/2019 (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2018-20839 since 05/16/2019. The attack may be initiated remotely. A simple authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Password
Class: Credentials management / Password
CWE: CWE-255
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Partially
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

05/16/2019 🔍
05/17/2019 +1 days 🔍
05/17/2019 +0 days 🔍
10/24/2024 +1987 days 🔍

Sourcesinfo

Product: github.com

Advisory: 9725f1a10f80f5e0ae7d9b60547458622aeb322f⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-20839 (🔍)
GCVE (CVE): GCVE-0-2018-20839
GCVE (VulDB): GCVE-100-135167
SecurityFocus: 108389

Entryinfo

Created: 05/17/2019 08:40
Updated: 10/24/2024 19:53
Changes: 05/17/2019 08:40 (54), 06/13/2020 10:10 (2), 09/21/2023 16:01 (5), 09/21/2023 16:06 (1), 10/24/2024 19:53 (30)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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